feat: move to gruvbox

overlays/default.nix

@@ -1,7 +1,8 @@
-{inputs, ...}: {
-  flake.overlays.default = final: prev: {
-    fairfax = final.callPackage ./derivations/fairfax.nix {};
-    nicotine-plus = final.symlinkJoin {
+{self, ...}: {
+  flake.overlays.default = _final: prev: {
+    fairfax = prev.callPackage ./derivations/fairfax.nix {};
+    river-bedload = prev.callPackage ./derivations/river-bedload {};
+    nicotine-plus = prev.symlinkJoin {
       name = "nicotine";
       paths = [prev.nicotine-plus];
       nativeBuildInputs = [prev.makeWrapper];
@@ -10,7 +11,7 @@
           --set-default NICOTINE_LIBADWAITA 1
       '';
     };
-    rose-pine-gtk-theme = prev.rose-pine-gtk-theme.overrideAttrs (prevAttrs: {
+    rose-pine-gtk-theme = prev.rose-pine-gtk-theme.overrideAttrs (_prevAttrs: {
       version = "master";
       src = prev.fetchFromGitHub {
         owner = "rose-pine";
@@ -20,20 +21,7 @@
       };
     });
   };
-  perSystem = {
-    pkgs,
-    system,
-    ...
-  }: {
-    _module.args.pkgs = import inputs.nixpkgs {
-      inherit system;
-      overlays = [
-        inputs.self.overlays.default
-      ];
-    };
-
-    packages = {
-      inherit (pkgs) fairfax nicotine-plus rose-pine-gtk-theme;
-    };
+  perSystem = {pkgs, ...}: {
+    packages = self.overlays.default null pkgs;
   };
 }